Refractive indexes of (Al,Ga,In)As epilayers on InP for optoelectronic
... eV (Gao.471no,53As)while maintaining a lattice constant matched to InP. The two ternary endpoints have a relatively large 0.5 eV conduction band offset, an attractive feature for electron confinement in quantum well structures. The material system also has the technological advantage of having only ...
... eV (Gao.471no,53As)while maintaining a lattice constant matched to InP. The two ternary endpoints have a relatively large 0.5 eV conduction band offset, an attractive feature for electron confinement in quantum well structures. The material system also has the technological advantage of having only ...
Image formation and optical transfer function in a course of
... The frequency of this five-bar object in the units used in Eq.(2) is 0.702 for NAO.5 and &=O.365tm. Fig. 4 shows the images of the five-bar test given by a system without aberration and with different coherence parameter values [different sizes of the effective light source]: Fig. 4a S=O.2, Fig. 4b ...
... The frequency of this five-bar object in the units used in Eq.(2) is 0.702 for NAO.5 and &=O.365tm. Fig. 4 shows the images of the five-bar test given by a system without aberration and with different coherence parameter values [different sizes of the effective light source]: Fig. 4a S=O.2, Fig. 4b ...
Super-Resolution Microscopy: Interference and Pattern Techniques
... values. In the following paragraphs, ways to circumvent this resolution limit are discussed, which are based on a manipulation of the illumination conditions. ...
... values. In the following paragraphs, ways to circumvent this resolution limit are discussed, which are based on a manipulation of the illumination conditions. ...
Imaging Properties of Laser-Produced Parabolic Profile Microlenses
... 2 which have larger numerical aperture and larger wave front aberrations and because of that smaller PSF. The second group consists of microlenses 3, 4, and 5 which have smaller numerical aperture and smaller wave front aberrations and because of that larger PSF. The spot diagram represents method f ...
... 2 which have larger numerical aperture and larger wave front aberrations and because of that smaller PSF. The second group consists of microlenses 3, 4, and 5 which have smaller numerical aperture and smaller wave front aberrations and because of that larger PSF. The spot diagram represents method f ...
X-ray Diffraction
... The different layers in a thin film can also be studied using a process called reflectivity. Thin films have the ability to reflect x-rays. The intensity of the reflected x-ray can be calculated based on the sample. Any deviation from this calculation in the data can be used to obtain density profi ...
... The different layers in a thin film can also be studied using a process called reflectivity. Thin films have the ability to reflect x-rays. The intensity of the reflected x-ray can be calculated based on the sample. Any deviation from this calculation in the data can be used to obtain density profi ...
fourier2012.pdf
... Fourier optics is a powerful tool for the coherent manipulation of optical fields, for the spatial frequency analysis of images, and for the construction of real time correlators. One property that makes optics an exciting tool for frequency analysis is that, in free-space propogation of light, one ...
... Fourier optics is a powerful tool for the coherent manipulation of optical fields, for the spatial frequency analysis of images, and for the construction of real time correlators. One property that makes optics an exciting tool for frequency analysis is that, in free-space propogation of light, one ...
Nikonorov_Fresnel_Le.. - The Computer Vision Foundation
... and as an element in X-Ray microscopes [5, 6]. Fresnel lenses have stronger chromatic aberration than simple refractive lenses do. One of the color channels (in this paper we use the green channel) has less blurring and can be used as a reference channel for the correction of the other two channels. ...
... and as an element in X-Ray microscopes [5, 6]. Fresnel lenses have stronger chromatic aberration than simple refractive lenses do. One of the color channels (in this paper we use the green channel) has less blurring and can be used as a reference channel for the correction of the other two channels. ...
Chapter 33 . Aberration Curves in Lens Design
... For a point on the axis of the optical system, all ray fans lie in the meridional plane and only one plot is needed to evaluate the system. For off-axis object points, a second plot is added to evaluate a fan of skew rays traced in a sagittal plane. Because a skew ray fan is symmetrical across the m ...
... For a point on the axis of the optical system, all ray fans lie in the meridional plane and only one plot is needed to evaluate the system. For off-axis object points, a second plot is added to evaluate a fan of skew rays traced in a sagittal plane. Because a skew ray fan is symmetrical across the m ...
Measurement of spectacle lenses: A review
... Recently freeform lenses are becoming a more suitable solution for the wearer of ophthalmic lenses, since they can be fabricated for the specific needs of the individual [5]. Free form lenses are irregular surfaces without a rotational axis, modeled with CAD software [6]. The precision of free form ...
... Recently freeform lenses are becoming a more suitable solution for the wearer of ophthalmic lenses, since they can be fabricated for the specific needs of the individual [5]. Free form lenses are irregular surfaces without a rotational axis, modeled with CAD software [6]. The precision of free form ...
A Carpet Cloak Device for Visible Light
... a reflective layer (the carpet). To achieve cloaking, the raised protrusion (the bump) created in the reflective layer is mapped to a flat plane and the resulting 2D index profile forms a carpet cloak device. In contrast to resonant optical structures [16,17], QCM carpet cloak provides a broadband l ...
... a reflective layer (the carpet). To achieve cloaking, the raised protrusion (the bump) created in the reflective layer is mapped to a flat plane and the resulting 2D index profile forms a carpet cloak device. In contrast to resonant optical structures [16,17], QCM carpet cloak provides a broadband l ...
A short introduction to light and electron microscopy
... then re-emitted as visible light or as heat. Objects or molecules that absorb light transiently and quickly reemit it as longer wavelength light are described as being phosphorescent or fluorescent depending on the time required for re-emission. Light can be scattered by small particles and structur ...
... then re-emitted as visible light or as heat. Objects or molecules that absorb light transiently and quickly reemit it as longer wavelength light are described as being phosphorescent or fluorescent depending on the time required for re-emission. Light can be scattered by small particles and structur ...
U17301 - 3B Scientific
... Light beam passing through glass concave lens – the rays are non-parallel to the optical axis Light beam passing through air convex lens – the rays are parallel to the optical axis Light beam passing through air convex lens – the rays are non-parallel to the optical axis Light beam passing through a ...
... Light beam passing through glass concave lens – the rays are non-parallel to the optical axis Light beam passing through air convex lens – the rays are parallel to the optical axis Light beam passing through air convex lens – the rays are non-parallel to the optical axis Light beam passing through a ...
Magnetic hyperbolic optical metamaterials ARTICLE
... reflection becomes o4%, which, for comparison, is lower than the reflection of glass. This is a direct consequence of the impedance matching of the metamaterial to air. Next, we analyse the phase accumulation of light inside the metamaterial (Fig. 2g–i). At 1,310 nm wavelength (Fig. 2g), the phase acc ...
... reflection becomes o4%, which, for comparison, is lower than the reflection of glass. This is a direct consequence of the impedance matching of the metamaterial to air. Next, we analyse the phase accumulation of light inside the metamaterial (Fig. 2g–i). At 1,310 nm wavelength (Fig. 2g), the phase acc ...
spatial filtering
... the different beams of light striking a particular point on the screen should all be coming from the same spot on the subject image. It is important to place the screen in the right place so that this will happen. Oddly enough, in this lab, you can get a very focusedlooking image even when equation ...
... the different beams of light striking a particular point on the screen should all be coming from the same spot on the subject image. It is important to place the screen in the right place so that this will happen. Oddly enough, in this lab, you can get a very focusedlooking image even when equation ...
Calculation of image position, size and orientation using first order
... This tutorial discussed the methods to calculation image location, size and orientation using first order properties. Gaussian properties and paraxial raytrace are used. Especially, image orientation and parities are mainly discussed in multiple prism systems. Also, some miscellaneous topics like Sc ...
... This tutorial discussed the methods to calculation image location, size and orientation using first order properties. Gaussian properties and paraxial raytrace are used. Especially, image orientation and parities are mainly discussed in multiple prism systems. Also, some miscellaneous topics like Sc ...
Computational photography with plenoptic camera and light field
... Photography is a cornerstone of imaging. Ever since cameras became consumer products more than a century ago, we have witnessed great technological progress in optics and recording mediums, with digital sensors replacing photographic films in most instances. The latest revolution is computational ph ...
... Photography is a cornerstone of imaging. Ever since cameras became consumer products more than a century ago, we have witnessed great technological progress in optics and recording mediums, with digital sensors replacing photographic films in most instances. The latest revolution is computational ph ...
Experimental demonstration of a light-ray-direction
... a transmitted light ray remains the same, apart from an inversion of the y component of the direction of a transmitted light ray. Stacked Dove prisms form a Dove-prism array [22]. Fig. 1(a) shows a Dove-prism array in which the Dove prisms are stacked in the y direction. Compared to a standard Dove ...
... a transmitted light ray remains the same, apart from an inversion of the y component of the direction of a transmitted light ray. Stacked Dove prisms form a Dove-prism array [22]. Fig. 1(a) shows a Dove-prism array in which the Dove prisms are stacked in the y direction. Compared to a standard Dove ...
Get PDF - OSA Publishing
... A particular solution is obtained if ϕ̄ = ϕ̄ ′ = θ2 + 2θ1 = θ̄2′ − 2θ̄3 = 0, that is, the reference ray in both the object and image space and the z-axis are parallel. Such a particular solution leads to the design proposed by Chrisp et al. [4]. The meridional and sagittal images are in fact curves ...
... A particular solution is obtained if ϕ̄ = ϕ̄ ′ = θ2 + 2θ1 = θ̄2′ − 2θ̄3 = 0, that is, the reference ray in both the object and image space and the z-axis are parallel. Such a particular solution leads to the design proposed by Chrisp et al. [4]. The meridional and sagittal images are in fact curves ...
SPDM: light microscopy with single
... conventional fluorescence microscopy methods, this resolution is 5–7 times better. In many imaging applications, the structural information desired is the size of nanostructures which are separated from each other by a distance larger than the Abbe limit. To solve this problem, spatially modulated i ...
... conventional fluorescence microscopy methods, this resolution is 5–7 times better. In many imaging applications, the structural information desired is the size of nanostructures which are separated from each other by a distance larger than the Abbe limit. To solve this problem, spatially modulated i ...
Size Estimation of Protein Clusters in the Nanometer Range by
... where all parameters of the first term of the sum are the same as defined in Eq. (1). Mg and E are positive parameters; z2 is the position of the maximum Mg of the object “disturbance”. The positive parameter L corresponds to the background intensity. This adaptation function is basically a superpos ...
... where all parameters of the first term of the sum are the same as defined in Eq. (1). Mg and E are positive parameters; z2 is the position of the maximum Mg of the object “disturbance”. The positive parameter L corresponds to the background intensity. This adaptation function is basically a superpos ...
Birefringence for facetors I : what is birefringence? First published in
... shows the same symmetry. There is no reason why light should travel more rapidly along this direction when it has one particular polarization plane rather than another. The refractive index, in other words, is polarization-independent, because there is no net direction perpendicular to this axis in ...
... shows the same symmetry. There is no reason why light should travel more rapidly along this direction when it has one particular polarization plane rather than another. The refractive index, in other words, is polarization-independent, because there is no net direction perpendicular to this axis in ...
Aberration-free three-dimensional multiphoton imaging of neuronal
... of neurons. However, direct electrical recordings from thin dendrites and simultaneous recordings from multiple identified neurons are difficult to achieve and often not feasible, especially in the in vivo setting. Instead, optical sectioning techniques using two-photon excitation of fluorescent ind ...
... of neurons. However, direct electrical recordings from thin dendrites and simultaneous recordings from multiple identified neurons are difficult to achieve and often not feasible, especially in the in vivo setting. Instead, optical sectioning techniques using two-photon excitation of fluorescent ind ...
Realization of optical carpets in the Talbot and
... 23. S. Nowak, C. Kurtsiefer, T. Pfau, and C. David, “High-Order Talbot Fringes for Atomic Matter Waves,” Opt. ...
... 23. S. Nowak, C. Kurtsiefer, T. Pfau, and C. David, “High-Order Talbot Fringes for Atomic Matter Waves,” Opt. ...
Superlens
A practical superlens, or super lens, is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is a feature of conventional lenses and microscopes that limits the fineness of their resolution. Many lens designs have been proposed that go beyond the diffraction limit in some way, but there are constraints and obstacles involved in realizing each of them.